Autoiviatic governor for dynaiwos



(No Model.)

E; B. COBURN.

AUTOMATIC GOVERNOR FOR DYNAMOS.

NO. 392,855. Patented P1021513, 1888.

UNITED STATES PATENT (Enrich.

EDYVARD B. COT-BURN, OF XVALPOLE, MASSACHUSETTS.

AUTQMATlC GQVERNGR FOR DYNAMG SPECIFICATION forming part of Letters Patent No. 392,855, dated November 13, 1888.

Application filed April 27, 1888.

T0 (LZZ whom, it may concern:

Be it known that I, EDWARD B. (JonURN, of WValpole, in the county of Norfolk, State of Massachusetts, have invented a certain new and useful Improvement in Automatic Governors for Dynamos, of which the following is a description sufficiently full, clear, and exact to enable any person skilled in the art or scienceto which siid invention appertains to make and use the same, reference bci n g had to the accompanying drawings, forming part of this specification, in which Figure 1 is aside elevation representing my improved governor in position for use; Fig. 2, a horizontal section taken on linear m in Fig. 1, certain parts being shown in top plan View; Fig. 8, a vertical transverse section taken on line 3/ y in Fig. 1, as viewed from the right; Fig. 4, a side elevation of the magnet, partly in section, and Fig. 5 a diagram showing the operation of the conical drums and rolls.

Like letters and figures of reference indicate corresponding parts in the different figures of the drawings.

My invention relates to that class of dynamogovernors which are automatically controlled by the electric current generated by the dynamo; and it consistsin certain novel features, as hereinafter fully set forth and claimed, the object being to produce a more effective and otherwise desirable device of this character than is now in ordinary use.

The nature and operation of the improvement will be readily understood by all con versant with such matters from the following explanation.

In the drawings, A represents the dynamo, B the governor proper,considered as a whole, and O the magnet.

As the dynamo may be of any well-known form or construction, it is not deemed essential to more'particularly describe the same.

The governor proper consists, essentially, of two pairs of end standards, D, two pairs of central standards, E, four conical drums, F G H J, two intermediate rolls, K L, and their supporting mechanism. Each of the drums is constructed in the form of a truncated cone, the drums F G being mounted on a shaft, m, which is journaled horizontally in cross bars 25, so pported by the standardsE D, the bases of said Serial XaQTQJlM. (No model.)

A sliding cap-boX, M, for the shaft 7: is fitted to work vertically between the standards E, said box resting on the central portion of said shaft and being provided with a screw, 6, which is fitted to work in a nut, 45, supported by a cross-bar, 47, on the upper ends of the stand ards Sliding capboxes N are also provided for the ends of the shaft is, said boxes being respectively fitted to work vertically in the standards D, and provided with screws (Z, which are fitted to work in nuts 5%,supported by cross-bars 55 on the upper ends of the standards D.

A cap-nut, P, (see Fig. 3,) is disposed between the crossbar t and cap-box M, said nut being fitted to slide horizontally at right angles to the shafts m k in ways 58, supported by the standards E, and provided with a screwthreaded groove on its lower face, in which a horizontally-arrangcd screw-threaded rod, 64;, works. The rod 6% stands at right angles to the shafts m 7:, andis supported in cross-bars 65, secured to the standards E, said rod and bars being so constructed and arranged that the rod may be rotated in its supports without being withdrawn therefrom.

Supported in the standards D, between the crossbars 25 and boxes N, there are cross-bars 67, and mounted in said cross-bars and the nut 1? there are two shafts, 34 and 85, the outer ends of these shafts being loosely jointed to their respective crossbars to permit their outer ends to swing horizontally, and theirinner ends inserted loosely in holes (not shown) at the opposite sides of said nut for a like reason.

A cylindrical roll, L, is loosely mounted 011 the shaft 34:, and a corresponding roll, K, on the shaft 35, the drums J H being so adjusted as to press upon said rolls, and the rolls respectively disposed equidistant from the ends of the drums.

An ordinary solenoid magnet, O, is secured to a beam or support, Q, above the governor B; and fitted to slide vertically in a bearing, 85, beneath said magnet there is a rod, 87, can

IfO

rying at its upper end an armature or conical piece of soft iron, 89, having its apex inserted in the central opening of the magnet.

A horizontally-arranged bar, 92, is centrally secured to the end of the serew-th readed rod 64., said bar being attached at one end to the lower end of the rod 87 and provided at its opposite end with a eounterbalancing-weight, 93, of sufficient size to counterbalance the rod 87 and armature 89. Ordinary conducting-wires, 94 and 95, connect the dynamo A with the magnet 0.

The shaft m is provided with a pulley, 96, which is connected by a belt, 97, with a pulley, 98, on the dynamo, and the shaft 7c is provided with a pulley, 14, which is connected by a belt, 15, with a pulley, 16, on the main driving-shaft 17.

From the foregoing it will be seen that the governor proper, B, is disposed between the dynamo and the main driving-shaft and constitutes a portion of the driving mechanism of the dynamo.

In the use of my improvement, power having been applied to the shaft 17, motion will be imparted to the drums J H, rolls L K, drums F G, and through them to the dynamo A, said drums and rolls being caused to rotate in the directions indicated by their arrows. When the speed of the dynamo becomes too great, or more electricity is being generated than is desirable, the magnet O, influenced by the excessive current passing over the wires 9i and 95, will have its power-increased accordingly, thereby attracting the armature 89, causing the rod 87 to slide upward, the bar 92 to be tilted, the rod 64 to partially rotate, and the nut l to be moved in the direction of said bar, whereby the inner ends of the shafts 3i and 85 will also be moved laterally in the direction of said bar and the rolls L K caused to travel toward the smaller ends of the drums J H. The drums F G being driven by the drums H J through the intermediate rolls, L K, it will be obvious that as said rolls travel inward toward the smaller ends of the drums J H the speed of the dynamo will be correspondingly reduced, thereby reducing the quantity I of strength of the electric current passing over when the speed of the dynamo is normal, and that by moving the inner ends of the shafts 34 and 35 toward or away from the bar 92 the rolls L K will be caused to travel toward or away from the nut P and the speed of the dynamo decreased or increased accordingly, as the case may be.

Having thus explained my invention, what I claim is 1. In a device for regulating the speed of a dynamo, the combination of the following instrumentalities, to wit: a pair of conical drums mounted on a shaft with their bases or larger ends adjacent to each other, a pair of conical drums mounted on a shaft with their apices or smaller ends adjacent to each other, said pairs of drums being arranged opposite and adjacent to each other with their shafts in parallelism and one pair belted to the dynamo and the other to a driving-shaft, an intermediate roll journaled between the opposite members of each pair of said drums and in contact and parallelism therewith, said rolls being adapted to swing laterally, a magnet connected by conducting-wircs with the dynamo, an armature disposed adjacent to the magnet and connected by intermediate mechanism with the shafts of said intermediate rolls, whereby said rolls may be swung laterally in one direction to decrease the speed of the dynamo when the power of the magnet is increased, and laterally in the opposite direction to increase its speed when the power of the magnet is decreased, substantially as set forth.

2. In a regulator for dynamos, the drums F G, journaled on the shaft m, the drums H J, journaled on the shaft is, the roll L, fitted to slide on the oscillating shaft 34, said roll being in contact with the drums H F, the roll K, fitted to slide on the oscillating shaft 85, said roll being in contact with the drums J G, the screws 11 b for exerting pressure on the drums and rolls, the sliding nut P, loosely connected with the rods 34L and 35, the journaled screwthrcaded rod 64-, engaged with said nut, the bar 92, mounted on said rod, the rod 87, connected with said bar and provided with the armature 89, the magnet G, and wires 94 and 95 for connecting said magnet with a dynamo, in combination with the driving-shaft 17, dynamo A, and suitable belts and pulleys for connecting said shaft with said drums and said drums with the dynamo, all being constructed and arranged to operate substantially as described.

EDWARD B. COBURN.

Witnesses:

E. M. SPINNEY, O. M. SHAW. 

